2) Drive several laps in testing mode on a track to create the deformation ( it's possible to use deformation_multiplier to generate it faster )3) Press left ctrl + d: a file named temp.dfm will be saved in the KRP installation folder4) Rename temp.dfm to track_id.dfm ( for example: oval.dfm ) and move it to the proper track folder, with the matching TRH file5) KRP should automatically read the dfm file at track load time